How to implement key press events ?

redstoneleo

The UI is as following .
http://img.my.csdn.net/uploads/201211/03/1351957960_1171.jpg

What I want is :
When I press the Enter key ,the label should shows “Enter”
When I press The blank space key ,the label should shows “space”

How to implement this ?

I know I should reimplement the keyPressEvent handler ,but I guss I was got stuck by the focus

jazzycamel

You're right, you are going to have issues with focus if you re-implement keyPressEvent for each button. The example below uses QAction's bound to the widget to capture the key events. The buttons then simply invoke these actions "triggered" method.

@
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class Widget(QWidget):
def init(self, parent=None):
QWidget.init(self, parent)

    l=QVBoxLayout(self)

    self.label=QLabel("(None)", self)
    l.addWidget(self.label)

    self.setEnterAction=QAction("Set Enter", self, shortcut=Qt.Key_Return, triggered=self.setEnter)
    self.addAction(self.setEnterAction)
    l.addWidget(QPushButton("Enter", self, clicked=self.setEnterAction.triggered))

    self.setSpaceAction=QAction("Set Space", self, shortcut=Qt.Key_Space, triggered=self.setSpace)
    self.addAction(self.setSpaceAction)
    l.addWidget(QPushButton("Space", self, clicked=self.setSpaceAction.triggered))

def setEnter(self): self.label.setText("Enter")
def setSpace(self): self.label.setText("Space")

if name=="main":
from sys import argv, exit
a=QApplication(argv)
w=Widget()
w.show()
w.raise_()
exit(a.exec_())
@

Hope this helps.